Kdttard schiegries



E. SCHIEGRIES TAMPING MACHINE March 15, 1932.

Filed Jan. 29, 1931 f. sh/e wS Patented Mar. 15, 1932 UNITED STATES EDUARD SOHIEGRIES, or DUISBURG-MEIDERICH,GERMANY PATENT oF cE TAMPING- v1mmmien Application filed January 29, 1931, Serial No;

and the mouth-piece of the machine. The

closing valve is operated by a compressed air motor which also operates the plunger of the machine; the plunger motor is provided with a piston which slides in a compressed air cylinder, the movement of the closing valve being regulated by air compressed by the said piston. The closing valve automatically closeson the back stroke of the piston and opens when the piston advances providing sufiicient counter pressure exists in the motor.

The accompanying drawings illustrate, by way of example, one construction of the invention, Figures 1, 2 and 3 being sectional elevations of the tamping machine in various working positions, and Fig. 4 is an enlarged sectional view of the cylinder, showing the valve control.

In these drawings 1 is the tamping machine in which a piston 12 carrying a plunger 2 is advanced and retarded by compressed air supplied to the cylinder 10, when the piston 12 advances it causes the plunger 2 to push stopping material through the mouth-piece 4 into the tap hole to be stopped, the stop ingmaterial first being fed into the mac ine through the funnel 3. Between the position going that in an arrangement according to the present invention no .molten metal can flow back from the furnace into'the tamping -mach'ine,;and also the arrangement is extreme- 'lysimple in construction and is safe and can of the forward stroke of the plunger 2 and the mouth-piece 4 is arranged a closing valve 5, for closing the said mouth-piece 4, which is connected to a piston 6 which slides in a compressed air cylinder 7, the said closing valve 5 being opened and closed by means of air pressure conveyed from the cylinder 10 i of the plunger motor to the compressed air cylinder? of the valve motor by means of pipe lines 8 and 9. 7

By turning the control lever 13 the eccentric three-port slide valve 14 is moved either to the left or to the right so that either the right cylinder side communicates through the chanoccupy two positions. It is obvious from Fig.

the operation may be repeated.

51 232 and in Germany February 5, 1930.

the exhaust channel 17 leading into the open air. On each cylinder side is provided a pressure piston valve 11 or 11" which may 4 that'b y the'pressure exertedpn the cylinder side, the piston of the valve is lifted against a spring so that the compressed air pipe 8 or -9"commu'nicates with the cylinder. -If the superatmospheric. pressure. on the cylinder side is eliminated, the valve-occupiesthe po sition shown in Fig. ion the left and in this position the compressed air pipe 8 communicates with the outer air.

. As is obvious from Figure 1 filling mate l rial is t intmduced'through. the funnel :3. 1 r

Since when the plunger 2 is withdrawn su eratmospheric pressure prevails on the right side of the cylinder 10, the piston 6 and with it the valve 5 islowered? If the leveri13 is reversed, therightside ofthe cylinder 10 will t be emptied and the left side filledwith superatmospheric pressure so that the piston 12 with th-e'plunger2will be moved forward and at the same time the piston 6 with'the valve 5 be moved upward as shown in Fig. 2.

nel "16 or the left cylinderside through the "channel 15 with the compressed air container connectedto the nipple 18.- 'Inthefirst case, the left cylinder side and in the second case p the right cylinder side communicates with If the controllever 13 is againreversed, the

:valve 5 willagain theclosed as is shown in Figures'3 and 4) and the piston 12xwillagain be returned to its normal position whereupon I It will be clearly understood from the forepressed air to the motor, a mouthpiece through which stopping material is delivered by the plunger, a closing valve for the said desire to secure by Let- Y valve motor when the piston of the mouth-piece, a compressed air motor for operating the said closing valve, and means whereby the compressed air motor for operating the closing valve is operated by counter pressure in the plunger motor at each end of the stroke of the plunger piston.

2. A tamping machine comprising atamping plunger, a. compressed air motor operating the plunger, means for admitting compressed air to the motor, a mouth-piece through which stopping material 'is delivered by the plunger, a closing valve for the said mouth-piece, a compressed air motor for operating the said closingvalve, pipe lines connecting the rear end of the plunger motorv to .the a underside of the valve. motor and the forward end of the'plunger motor to the top of the valve motor and means whereby the compressed air motor for op-e erating the closing valve is operated through i the pipe lines by counter pressure in the plunger motor at each end of the stroke of the plunger piston. I v 3. A tamping machine comprising aitamping plunger, a compressed airmotor oper- ,ating the plunger, means for admitting compressed air to the motor, a mouth-piece through which stopping material is delivered by the plunger, a closing valve for the said mouth-piece,- a compressed air motor for operatingv the said closing valve, pipe lines connecting the rear end of the plunger motor to the underside of the valve motor and the forward end of the plunger motor to the top of the valve motor, automatic spring controlled air valves provided in the said pipe lines, the said valvesbeing arranged to open only to admit compressed air to the motor is at each end of itss'troke.

v 4. A tamping machine comprising a tamping plunger, a compressed air motor operating the plunger, means for admittingcompressed air to the-motor, a mouth-piece. .1

through which stopping material is delivered by the plunger, a closing valve for the said mouth-piece, a compressedvair motor for operating the said closing valve, pipe lines connecting the rear end of the plunger 7 motor to the underside of the valve motor and the forward end. of the plunger motor a to the top of :the valve motor, automatic spring controlledair valves provided in the said pipe lines, the said valves. being arranged to open only to admit compressed air to the valve motor when the piston of the plunger motor has compressed air in the ends of the motor cylinder sufiicientjto overcome the load of the springs in the air valves.

- e E-DUARD SCHIEGBIES.

plunger a. 

